[Vor. 7 
184 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Type: in Herb. Schweinitz and Curtis Herb. 
Fructification coriaceous, thin, small, effuso-reflexed, some- 
times confluent along branches, often conical and attached by 
one side and the umbo and some- 
times only by the umbo, the upper 
side villose-tomentose, somewhat fur- 
rowed, white, weathering gray; in 
structure 200—300 uy thick below the 
f hairy covering, with intermediate 
layer becoming bordered on the 
Fig. 27. S. ochraceo-flavum, YPPY side by a denser or colored 
Hymenium showing three cys- 20ne when old and weathered, com- 
tidia, X 488. posed of densely and longitudinally 
arranged, hyaline hyphae 3-4 y in 
diameter; no colored conducting organs; hymenium even, 
“yellow,” becoming cream-buff in the herbarium; cystidia not 
incrusted, obtuse, 20-25 X4-6 y, protruding up to 15 u; spores 
not found. 
Reflexed portion 3-5 mm. broad, and about as long; scattered 
conical pilei 3-5 mm. in diameter. 
On dead branches of frondose species. Canada to Mississippi 
and westward to Missouri, and in California and Mexico. 
July to May. 
S. ochraceo-flavum may be recognized at sight by its small, 
white, conical fructifications heavily clothed with long, soft 
hairs and by its bright yellow hymenium. The non-incrusted 
cystidia afford a good distinetive microscopical character for 
separation of this species from very small specimens of S. sul- 
phuratum. In specimens which have persisted beyond their 
normal season of active growth, the upper side of the interme- 
diate layer becomes hardened and pale golden. 
Specimens examined: 
Exsiecati: Ellis, N. Am. Fungi, 17; Ell. & Ev., Fungi Col., 6; 
Ravenel, Fungi Am., 787; Ravenel, Fungi Car. 2:31; 
de Thümen, Myc. Univ., 10. 
Ontario: Ottawa, J. Macoun, 242. 
Vermont: Middlebury, E. A. Burt. 
Massachusetts: D. W. Weis, comm. by C. G. Lloyd, 145 (in 
Mo. Bot. Gard. Herb., 56687); Cambridge, E. A. Burt; 
Magnolia, W. G. Farlow. 
